255804169 has 2 divisors, whose sum is σ = 255804170. Its totient is φ = 255804168.

The previous prime is 255804167. The next prime is 255804173. The reversal of 255804169 is 961408552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195664144 + 60140025 = 13988^2 + 7755^2 .

It is a cyclic number.

It is not a de Polignac number, because 255804169 - 2¹ = 255804167 is a prime.

It is a super-2 number, since 2×255804169² = 130871545755561122, which contains 22 as substring.

Together with 255804167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (255804167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127902084 + 127902085.

It is an arithmetic number, because the mean of its divisors is an integer number (127902085).

Almost surely, 2^255804169 is an apocalyptic number.

It is an amenable number.

255804169 is a deficient number, since it is larger than the sum of its proper divisors (1).

255804169 is an equidigital number, since it uses as much as digits as its factorization.

255804169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 255804169 is about 15993.8791104597. The cubic root of 255804169 is about 634.7984720189.

The spelling of 255804169 in words is "two hundred fifty-five million, eight hundred four thousand, one hundred sixty-nine".